From the standpoint of pathology, the term pyloric stenosis is usually inaccurate at least in adult patients, since the site of obstruction is rarely situated at the pylorus itself but is more often placed immediately proximal to the sphincter where the diagnosis of carcinoma is most probable or more distally in the duodenal bulb where the cause is almost invariably a duodenal ulcer. This study has been taken up to review the changes in presentation of gastric outlet obstruction in view of changing trends in the aetiology analysing the occurrence of benign and malignant causes, signs and symptoms, investigatory modalities, management and their results. The present study is an observational study a total of 50 cases were studied with Cicatrised duodenal ulcer and carcinoma pyloric antrum being the major causes. Clinical profile, investigations and treatment outcomes were analysed. The majority of patients had malignant gastric outlet obstruction with 32[64%] patients presenting with Gastric cancer and 18[36%] patients presenting with cicatrised duodenal ulcer. In this study most patients were in the fifth and seventh decades of life. Men outnumbered women by 3: 1. The clinical presentation is not different from those in other studies with non-bilious vomiting being common to all the patients with dehydration. Visible gastric peristalsis and succussion splash were more prominent in Cicatrised Duodenal Ulcer. All cases were subjected to serum electrolyte estimation. Out of them 20 cases [40%] showed electrolyte imbalance barium meal, ultrasound abdomen pelvis and CT scan abdomen being the other investigating tools. Blood group 'O' was common in cicatrized duodenal ulcer patients [77.7%] followed by blood group 'A' [11.1%]. Upper GI endoscopy was done in all cases [100%]. 32[64%] cases had pyloric antral Carcinoma in which 23 cases had fungating growth and the rest 9 had ulcerative growth and 18[36%] had cicatrized duodenal ulcer. 100% of cicatrized duodenal ulcer patients underwent truncal vagotomy with posterior gastrojejunostomy. In carcinoma of pyloric antrum, 56.25% underwent Billroth II Polya gastrectomy after subtotal resection and 25% underwent anterior gastrojejunostomy and 18.75% underwent feeding jejunostomy alone depending on the stage of the disease. The average hospital stay was 10 days. The overall mortality rate was 6% (9.3% for malignant cases). Mortality rate was zero in case of cicatrised duodenal ulcer. Surgical site infection was the most common post-operative complication accounting for 38.2% of cases. One patient with carcinoma pyloric region developed duodenal blow out on the 5th day and died due to biliary sepsis.